我想调用一个现有的方法,该方法需要一个屏幕截图并每s秒执行一次,具体取决于用户的输入。
在不停止程序的情况下怎么可能做到这一点?
编辑:我不想n次或在s秒后调用该函数。相反,我想每秒钟运行一次,而不会导致程序停止。
答案 0 :(得分:1)
在这种情况下,请使用“ Timer和TimerTask类”
import java.util.Timer;
import java.util.TimerTask;
/**
* Simple demo that uses java.util.Timer to schedule a task
* to execute once 5 seconds have passed.
*/
public class Reminder {
Timer timer;
public Reminder(int seconds) {
timer = new Timer();
timer.schedule(new RemindTask(), seconds*1000);
}
class RemindTask extends TimerTask {
public void run() {
System.out.println("Time's up!");
timer.cancel(); //Terminate the timer thread
}
}
public static void main(String args[]) {
new Reminder(5);
System.out.println("Task scheduled.");
}
}
........ The below answer was for the same question which was edited later on ........
In Java 8, You can do this to call a method n times:
But if you put it into a little helper function that takes a couple of parameters
IntStream.range(0, n).forEach(i -> doSomething());
void repeat(int count, Runnable action) {
IntStream.range(0, count).forEach(i -> action.run());
}
This will enable you to do things like this:
repeat(3, () -> System.out.println("Hello!"));
and also this:
repeat(4, this::doSomething);
答案 1 :(得分:0)
根据您的描述,可能与java: run a function after a specific number of seconds重复
根据您的标题, 您可以使用递归调用n次
int number = 6; // can be anything as per user input
callMethod(number);
//methid implementation
void callMethod(int n) {
//do stuff
if (n>0)
{
callMethod(n-1);
}
}
答案 2 :(得分:0)
您可以创建一个方法,该方法将接收一个整数(n秒),然后在Thread.sleep(n * 1000)之后执行屏幕截图方法。
public void screenShotWithTimer(int n){
while(true){
takeScreenShot();
try{
Thread.sleep(n*1000);
}catch(InterruptedException e){}
}
}